[ getAlby/js-sdk ] fix: Allow passing additional scopes to getAuthClient in examples helper function (#489)

* feat(auth): Allow passing additional scopes to getAuthClient

* refactor(examples/oauth): Pass specific scopes required by the examples

* fix: allow examples pass the scope they need

* chore: pass scopes directly

https://github.com/getAlby/js-sdk/commit/1dcd789d09c8205dd507c283fe60fb1aef654d47